Figure 1. Immunohistochemical localization of matrix metalloproteinases in melted and control corneas. Immunohistochemical localization of MMP 1, 2, 3, 7, 8, 9, and 13 in representative images of melted corneal specimens obtained from patients with pSS (cases 1 and 2) and from control corneas. Original magnification, 100×. Ep = epithelium, AS = anterior stroma, PS = posterior stroma, En = endothelium.